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104. We apply Eq. 1012 twice, assuming the sense of rotation is positive. We have
ω
> 0
and
α
< 0. Since the angular velocity at
t
= 1 min is
1
= (0.90)(250) = 225 rev/min, we
have
ωωα
10
225 250
1
25
=+
¡
=
−
=−
ta
rev / min .
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 Spring '08
 Any
 Physics

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